221003121031123 has 4 divisors (see below), whose sum is σ = 224748936641880. Its totient is φ = 217257305420368.

The previous prime is 221003121031067. The next prime is 221003121031177. The reversal of 221003121031123 is 321130121300122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221003121031123 - 2⁴⁵ = 185818748942291 is a prime.

It is a super-3 number, since 3×221003121031123³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221003121031094 and 221003121031103.

It is not an unprimeable number, because it can be changed into a prime (221003121031423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1872907805290 + ... + 1872907805407.

It is an arithmetic number, because the mean of its divisors is an integer number (56187234160470).

Almost surely, 2^{221003121031123} is an apocalyptic number.

221003121031123 is a deficient number, since it is larger than the sum of its proper divisors (3745815610757).

221003121031123 is an equidigital number, since it uses as much as digits as its factorization.

221003121031123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3745815610756.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 221003121031123 its reverse (321130121300122), we get a palindrome (542133242331245).

The spelling of 221003121031123 in words is "two hundred twenty-one trillion, three billion, one hundred twenty-one million, thirty-one thousand, one hundred twenty-three".